Shader preprocessor #if and #else highlighted with wrong color

[Kinwailo]

Godot version

4.0.3

System information

Win7

Issue description

#if and #else highlighted with the color same as if and else shader statement:

Steps to reproduce

1. Create shader
2. Add #if and #else

Minimal reproduction project

N/A

[Calinou]

Syntax highlighting keywords in CodeEdit can't contain symbols like #, so this is a limitation we can't fix directly. Otherwise, we could add all preprocessor keywords as keywords and give them their own color (similar to the @annotation color in GDScript).

The GDScript syntax highlighter uses a custom system to declare annotation colors, which is not available in the "generic" syntax highlighter used for shaders.

[bitsawer]

We could probably change the preprocessor keywords to use control flow keyword colors, that way they would be at least consistent. Currently they mix control flow and normal shader keyword colors because they conflict with normal shader keywords, which can look a bit weird. I'll probably make a PR at some point, this has been bugging me a bit, too. It's a simple change, looks like this:

Long term solution would be to create an improved syntax highlighter as Calinou said, but there tends to more important tasks at hand currently.